Thornton could not immediately say who Manson called this time, nor how he got the phone.

Manson, who began organizing his cult in San Francisco’s Haight-Ashbury district during the summer of 1967, is serving a life sentence for killings including the infamous murders of actress Sharon Tate and six others in California in 1969.

He faces a disciplinary hearing for the prison cell phone use and could lose early release credits.